Trubić families are Croats and they are mostly from Slunj. In the past century, relatively most of Croatian residents bearing this family name were born in Rijeka and Slunj.
Prevalence
About 130 people with faimily name Trubić live in Croatia today, in 60 households. There were 140 of them in the middle of the past century, and their number decreased by 10 percent. They are located in 10 Croatian counties, in 16 cities and 15 other places, mostly in Zagreb (30), Karlovac (20), Rijeka (15), Varazdin (10), and in Gornji Ladjevac (<10).
In the sources analysed in the project Acta Croatica so far, the name is mentioned few times, the first time 2007 in source Encyclopaedia of Croatian Surnames.